books.google.co.uk - Once known as the "great fire" or "spotted death," smallpox has been rivaled only by plague as a source of supreme terror. Although naturally occurring smallpox was eradicated in 1977, recent terrorist attacks in the United States have raised the possibility that someone might craft a deadly biological...https://books.google.co.uk/books/about/The_Greatest_Killer.html?id=z2zMKsc1Sn0C&utm_source=gb-gplus-shareThe Greatest Killer